Winthrop is located close to the center of Massachusetts. Winthrop is part of Suffolk County. As of 2005-2009, the total Winthrop population is 18,605, which has grown 1.65% since 2000. The population growth rate is lower than the state average rate of 4.85% and is much lower than the national average rate of 11.61%. Winthrop median household income is $64,559 in 2005-2009 and has grown by 21.53% since 2000. The income growth rate is much lower than the state average rate of 34.34% and is lower than the national average rate of 27.36%. Winthrop median house value is $404,900 in 2005-2009 and has grown by 88.15% since 2000. The house value growth rate is higher than the state average rate of 77.65% and is much higher than the national average rate of 46.91%. As a reference, the national Consumer Price Index (CPI) inflation rate for the same period is 26.63%. On average, the public school district that covers Winthrop is worse than the state average in quality. The Winthrop area code is 617.